Your commands really helped. We were able to see that some ip addresses were being blocked during a call session. We added 3 ip addresses to the SIP Access Group access-list and that fixed the problem. Bandwidth says that we should never see those servers, but the calls did not go through till we added them to the allow list. As side note, we could have added those to the additional servers tab in the Generic SIP trunk set up, but we did not realize it until we added those in cli. Thanks again.